diff options
| -rw-r--r-- | virt/kvm/arm/vgic/vgic.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic.c b/virt/kvm/arm/vgic/vgic.c index 9d4e01f10949..07ee8e4e00a2 100644 --- a/virt/kvm/arm/vgic/vgic.c +++ b/virt/kvm/arm/vgic/vgic.c @@ -199,6 +199,13 @@ static int vgic_irq_cmp(void *priv, struct list_head *a, struct list_head *b) bool penda, pendb; int ret; + /* + * list_sort may call this function with the same element when + * the list is fairly long. + */ + if (unlikely(irqa == irqb)) + return 0; + spin_lock(&irqa->irq_lock); spin_lock_nested(&irqb->irq_lock, SINGLE_DEPTH_NESTING); |